Two identical light sources S_1 and S_2 emit | vedclass

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Question

(A) For two light sources to produce a stable interference pattern,they must be coherent. Coherent sources are defined as sources that emit light wave

Vedclass · Accepted Answer

Their phase differences remain constant

Vedclass · Answer

(A) For two light sources to produce a stable interference pattern,they must be coherent. Coherent sources are defined as sources that emit light waves of the same frequency and wavelength,and maintain a constant phase difference over time. If the phase difference between the two sources varies randomly with time,the interference pattern will shift rapidly,resulting in a uniform average intensity rather than a stable interference pattern. Therefore,the condition for observing interference is that the phase difference between the light waves must remain constant.

Two identical light sources $S_1$ and $S_2$ emit light of same wavelength $\lambda$. These light rays will exhibit interference if

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